Lock.



O. HANSEN.

LOOK.

. APPLICATION FILED AUG. 15, 1913.

1,095,500. Patentd'May 5,1914.

w Christian Hansen,

witme/awo CHRBT IAN HAN SEN, OF DAVENPORT, IOWA.

LOCK.

Specification of Letters Patent.

Patented May a, rate.

Application filed August 15, 1913. erial No. 784,886.

To all whom it may concern:

Be it known that I, CHRISTIAN HANSEN,

who have declared my intention of becoming a key-cylinder, mounted within a casing,

and normally held againstfturning move mentby tumblers, which are moved to their releasing positions by the insertion of a properkey within the opening of the key cylinder. 7

Animport-ant object of this invention is to provide a lock of the above mentioned character, which may be readily operated by a key inserted from either end of the same upon the key being inverted when withdrawn from one end of the key-hole before being inserted within the opposite end thereof.

A further object of my invention is to provide a lock of the above mentioned character, which will be very difiicult to fraudulently operate.

A further object of my invention is to provide a lock of the above mentioned character, which is simple in construction, cheap to manufacture, strong and durable.

Other objects and advantages of this invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure 1 is a central longitudinal sectional view through the lock, Fig. 2 is a transverse section, taken on line 2+2 of Fig. 1, and looking in the direction of the arrows, Fig. 3 is an end elevation of the outer casing taken on line 33 of Fig. 1, Fig. 4 is an elevation of one end of the key-hole cylinder, Fig. 5 is a similar view of the opposite end thereof, and, Fig. 6 is a side elevation of the same.

In the, drawings wherein is illustrated a preferred embodiment of my invention, the numeral 7 designates an outer casing, which is ordinarily stationary, having a main central opening 8, to receive a key cylinder 9,

which has a key-hole or opening '10 extending longitudinally therethrough from end to end. This key cylinder is preferably formed in two longitudinal parts 9', as shown. The parts 9 are provided with interfitting tongues and grooves 9*, as shown. The key cylinder 9 is cylindrical throughout the greater portion of its length and is prowithin either or both ends of the key cylin der'9 for operating the tumblers, to be described. When the key 14 is inserted in the right end of the key hole 10, (the end shown in Fig. 3), the same will assume the position shown in Fig. 1, but when inserted into the left end of the key-hole 10, it is obvious that the key must be inverted, so thatthe rib 11 may enter the slot 12. It is' to be understood that the shape of'the key-hole may be changed if desired, with a corresponding change in the shape of the key, in crosssection.

The numerals 15, 16, 17 and 18 designate tumblers, disposed within openings 15 formed in the outer casing 7, the same being held therein-by slides 16, asshown. These tumblers control the turning or rotation of the key cylinder 9. The tumblers 15 and 16 are identical and the tumblers 17 and 18 are identical, whereby the key will operate the same, when being inserted from either or both ends of the key cylinder.

The shank 13 if the key is provided with bittings 19 and 20, disposed near the oppo-' site ends of the shank upon the opposite longitudinal edges thereof, such bittings being identical and serving to operate the tumblers 15 and 16 respectively when the key is inserted through the right end of the keyhole cylinder 9, and operating the tumblers 16 and 15 respectively when inserted through the opposite end thereof. The shank 13 is provided near its opposite ends and 28 of each tumbler, upon the insertion and upon opposite longitudinal edges thereof with bittings 21 and 22, which are identical and are adapted to operate the tumblers 17 and 18 respectively when nserted through the right end of the key-hole cylinder 9, and to operate the tumblers l8 and 17 respectively, when inserted through. the opposite end thereof.

Each of the tumblers comprises radial 1nner and outer pins 24 and 25, which are longitudinally movable and are arranged in end to end relation, as shown. Surrounding the pins 24 and 25 are intermediate sleeves 2 6 and 27 respectively, having slidable engagement therewith and arranged in end to end relation. Surrounding the intermediate sleeves 26 and 27 are outer sleeves 28 and 29, slidably engaging therewith and arranged in end to end relation. The radial inner pin 24 and the sleeves 26 of the key 14, are moved outwardly the proper distance so that their outer ends come into registration with the periphery of the key cylinder 9, whereby the latter may be turned. In each tumbler, the pin 25 is forced inwardly by a spring 30, the sleeve 27 by a spring 31, and the sleeve 29 by a spring 32, as shown. The spring 31 engages a cup-shaped casing 30, receiving the outer end of sleeve 27, which is engaged by 'the spring 31. This spring 31 is mounted upon a headed pin 31, arranged within the cup-shaped casing 30, as shown.

It is not desired to restrict the invention to any particular shape of bittings, as the same may be varied as may be found advantageous, it suliicing that these bittings that are arranged adjacent the opposite ends of the key shank and upon opposite longitudinal edges thereof, be identical.

The bolt or bolts (not shown), are operated by suitable means (not shown) which are preferably mounted upon the polygonal end portions 12 of the key-cylinder 9. The bolt or bolts, however, may have operative connection with the key-cylinder by any other suitable means.

In the operation of the lock, the key is inserted through either end of the keyhole 10 and will serve to operate the tumblers so that they will release the key cylinder 9, thus allowing the same to be rotated or turned. This key cylinder operates the bolt or bolts (not shown) as is customary in looks of this type. Z

It is to be understood that the form of my invention herewith shown and described, is to be taken as apreferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the sub joined claims.

Having described my inventiomlclaim 1. A look of the character described, comprising in combination a casing having a main opening, a key cylinder rotatably mounted therein and provided with a key hole extending through both ends thereof, tumblers arranged upon opposite sides of the key cylinder to normally prevent its rotation, a key adapted for insertion through either end of the key-hole and provided upon opposite edges with identical bittings which are diagonally arranged and adapted to operate the tumblers upon the insertion of the key into the key-hole andthe inverting of the same after being drawn out of one end of the key-hole and before being inserted into the opposite end thereof, and means for necessitating the inverting of the key before inserting it into one end of the key-hole upon removing it from the opposite end of the key-hole.

2. A look of the character described, comprising in combination a casing having a main opening, a key cylinder rotatably mounted therein and provided with a keyhole extending through both ends thereof, pairs of tumblers longitudinally spaced with relation to the key cylinder and arranged near opposite sides thereof, the tumblers in each pair being dissimilar and the tumblers in different pairs arranged upon opposite sides of the key cylinder being identical and longitudinally spaced, a key adapted for insertion through both ends of the key-hole and provided with pairs of longitudinally spaced bittings formed upon the'longitudinal edges thereof, the bittings in the same pair being dissimilar and the bittingsin one pair being identical with the hitting in the other pair arranged upon the opposite longitudinal edge of the key whereby the bittings will operate all of the tumblers when inserted through one end of the key-hole and through the opposite end thereof upon being inverted, and means for I arranged in end to end relation within the outer sleeves to reciprocate therein with one intermediate sleeve passing over the compressible coil spring and extending into the cup-shaped casing, a compressible coil spring arranged within the cup-shaped casing and engaging the last named intermediate sleeve, a plurality of pins mounted to reciprocate Within the intermediate sleeves, a headed pin mounted within the cup-shaped casing and having the coil spring therein surrounding it, and a coil spring arranged between the headed pin andone of said pins.

CHRISTIAN HANSEN.

Witnesses:

HUGO C. VOGT, HENRY H. JEBENS. 

